physical law

noun2

1. •
   A scientific generalization based upon empirical observation that is part of physics, standing in contrast to chemical law, biological law, sociological law, etc.

   • No organism can behave in a manner that would break or contradict physical and chemical laws. — 2005
2. •
   A universal statement about the operation of nature, based on empirical observations of physical behavior, tested using the scientific method.

   • the celebrated Northampton Tables agree with Demoivre's hypothesis in their money results, though by no means exhibiting the same physical law of life — 1861